HICAS comes on all skylines this means it has 4 wheel steering(for info do a search on hicas there will be 244,000 threads) A-lsd stands for active limited slip differential this is extreamly rare you are lucky if you have this it is a gtr vspec feature, basically it means you have the same differential as a gtr vspec see my attached picture for details.........it is a feature that costs an extra 5k brand new and is the best!
for all those that dont know do a search on a-lsd and you will find out,,,